84844391 has 4 divisors (see below), whose sum is σ = 84879384. Its totient is φ = 84809400.

The previous prime is 84844381. The next prime is 84844423. The reversal of 84844391 is 19344848.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 84844391 - 2⁶ = 84844327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84844321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13565 + ... + 18806.

It is an arithmetic number, because the mean of its divisors is an integer number (21219846).

Almost surely, 2^84844391 is an apocalyptic number.

84844391 is a deficient number, since it is larger than the sum of its proper divisors (34993).

84844391 is a wasteful number, since it uses less digits than its factorization.

84844391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34992.

The product of its digits is 110592, while the sum is 41.

The square root of 84844391 is about 9211.1015085059. The cubic root of 84844391 is about 439.4144949784.

The spelling of 84844391 in words is "eighty-four million, eight hundred forty-four thousand, three hundred ninety-one".